Rahul Narain

16,940 reputation

22358

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	age	28
visits	member for	2 years, 9 months
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Almost all of the questions on the front page these days are homework questions or textbook exercises. I think I'll be spending a lot less time here.

	16,940 reputation	bio	website		visits	member for	2 years, 9 months
22358 badges		location			seen	15 hours ago

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449 Revisions

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Nov 29	revised	Embedding torus in Euclidean space improved LaTeX formatting
Nov 29	revised	Writing $f(x,y)$ as $\Phi(g(x) + h(y))$ correction: not any $f$ is a counterexample, but there exists some $f$ which is
Nov 28	revised	Solving the equation $x e^x = e$ whoops, false double negative
Nov 27	revised	Is $\lim\limits_{n \to \infty}\frac{1}{n}\left( \cos{\frac{\pi}{n}} + \cos{\frac{2\pi}{n}} + \ldots + \cos{\frac{n\pi}{n}} \right)$ a Riemann sum? adding non-math text to link, following http://meta.math.stackexchange.com/questions/1204/mathjax-menu-obliterates-link-menu-when-the-entire-link-is-latex
Nov 26	revised	Solving for x in $0 < y \bmod x \le 100$ where x is in the range (a, b) changed \mod to \bmod
Nov 24	revised	When is $\frac1{n}\sin(nt)=\frac1{n+2}\sin((n+2)t)$? fixed an error that crept in when transcribing the equation from the whiteboard
Nov 24	revised	Show that this is a vector space and determine the dimension minor formatting fix
Nov 15	revised	Sequences of pairs where adjacent elements differ in exactly one component oh, you want hamiltonian paths
Nov 15	revised	Sequences of pairs where adjacent elements differ in exactly one component found an algorithm for you; added 49 characters in body
Nov 14	revised	Is there a basis-independent proof of Abel's identity? added a geometric interpretation
Nov 11	revised	Area of a spherical triangle added preemptive clarification
Nov 1	revised	prove that $ A^k$ is diagonalizable edited tags
Oct 30	revised	Calculating $\sum\left[ x^{2} y \right ]$ edited tags
Oct 30	revised	A tree of convex sets? An ugly answer to the updated question; deleted 21 characters in body
Oct 22	revised	What is wrong in my proof that 90 = 95? Or is it correct? fixed unicode "angle" character
Oct 22	revised	Example of a continuous function from $(0,1) \times (0,1)$ to $\mathbb{R}^2$ added 77 characters in body; edited title
Oct 21	revised	variant on Sierpinski carpet: rescue the tablecloth! added 118 characters in body
Oct 18	revised	Can a function describe an area on a graph like an integral? edited tags
Oct 14	revised	Covering ten dots on a table with ten equal-sized coins: explanation of proof edited tags
Oct 14	revised	what are simple lower bounds on w^t A w in terms of \|\|w\|\|_2^2? added 36 characters in body